Appliance for automatically and otherwise locking and unlocking railway-carriage doors.



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DAVID ANDREWS AND CHARLES BICKERTON, OF MANCHESTER, ENGLAND; SAID BICKERTON ASSIGNOR '10 SAD ANDREWS.

APPLIANCE FOR AUTOMATICALLY AND OTHERWISE LOCKING AND UNLOCKING RAIL- WAY-CARRIAGE DOORS.

To all whom 'it 'may concern:

Be it known that we, Davie ANDREWS, of 538 Gorton Lane, Gorton, and CHARLES Broiinn'roN, otl 133 North road, Clayton, both in the city of Manchester', England, and subjects of the King of Great Britain, have invented new and useful lmprovements in Appliances for Automatically and Otherwise Locking and Unlocking Railway-Carriage Doors, of which the following is a specification.

Our invention relates in one arrangement to improvements in appliances for automatically locking and unlocking railway carriage doors, and has for its objects to lock all the closed carriage doors automatically as soon as the train has attained a certain amount of speed and to prevent the possibility of the locked doors being opened until the train has stopped, to enable any door, which has remained open through inadvertence or otherwise, to be closed after the train has started, such door being at once locked automatically by the act of closing, and to unlock all the doors automatically immediately the train has come to a stand.

In carrying our improvements into effect we fit a spring bolt in the jamb of each door and we connect all the spring bolts on the same side of the carriage by levers or other suitable connections passing through the side framing to a swinging rail or equivalent part suspended preferably at or about the level of the lower ootboard on the carriage. There is thus a swinging rail or equivalent at each side of the carriage and near one end of each rail or in any other convenient position we mount a suitable fan or equivalent, which is set in motion or moved by the resistance of the air when the train attains a slight speed and by the movement of a cam or equivalent actuated either directly or indirectly by the movement of the fan the rail is moved endwise against the resistance-of a spring, and this movement is transmitted through the connections to all the spring bolts controlled by the rail, so that these bolts are at once shot forward into their respective doors which are thus locked and remain locked without any possibility of openinglthe same until the train comes to a standstil When the train stops and the fans cease to Speeicaton of Letters Patent.

Application led April 24, 1909.

Patented Dec. 2, i909.

serial No. 491,943.

actuate the cams, each spring above mentioned moves back its swinging rail and through its connections withdraws the spring bolts and unlocks all the doors which it controls so that they can be opened by the ordinary handles.

When it is desired to actuate the swinging rails from, say the guards van, we dispense with the fans or their equivalents and in place of them we connect each swinging rail to the swinging rail on the adjoining carriage and couple the rail on the guards van to a hand lever under the guards control so that he can move the lever to lock all the doors when the train starts and unlock them when the train stops.

In the event of the train starting without all the doors having been closed the spring bolts allow such doors to be closed, but they are at once locked automatically by the means described and cannot again be opened until the train stops, or the doors are released from the guards van, or from the locomotive.

In the accompanying sheet of drawings,- Figure 1 is a side elevation and Fig. 2 an end view of a railway carriage to which our improved appliances for automatically locking and unlocking the doors are applied.

lin the drawings, a designates the body of a railway carriage; Z2 a series of spring bolts one litted in the jamb of each door; c a series of pivoted levers, connected at their upper ends to the spring bolts and at their lower ends to a swing rail; d the swing rail pivoted at each end to an arm c which is pivoted at its upper end to the carriage frame; f a fan or vane formed of a dished plate of metal; g a transverse shaft upon which the vane f is secured; and 71, a cam secured upon the shaft g, immediately in line with an arm e which supports the rail d. To prevent the vane f moving the cam It too far a stop piece It is secured to the carriage frame against which the cam z, abuts when partially turned by the vane..

There is a spring c' behind each bolt b, and a spring j secured to the carriage frame which rests against the end of the swinging rail ci and holds it in its normal position when the carriage is stationary, the spring bolts being held back clear of the doors by the levers c.

W'ith the exception of the shaft g all the parts enumerated are duplicated upon the other side of the carriage.

In operation, when the train attains a slight speed the vane f by the resistance of the air will be moved back, thus partially turning the shaft g and the cam L upon it up to the stop piece L and the cam acting upon the pivoted arm e will move it whereby the rail Z will be moved endwise against the resistance of the spring j and this movement is transmitted through the levers 0 to the spring bolts Z) which will be shot forward simultaneously into their respective doors, which are thus locked and remain locked without any possibility of opening the same until the train comes to a standstill. Each spring bolt is slotted to receive a pin upon its pivoted lever c and has its outer end chamfered or beveled olf as is well understood so that in the event of the train starting without all the doors having been closed the springs z' and the slotted connection between the bolts and the levers will allow such doors to be closed and locked, and the doors cannot then be again opened until the train stops.

l/Jhen the train stops and the vane f falls to its normal position, the cam 71J will be moved to allow the spring y' to force back the swinging rail (l, which through its connections withdraws the spring bolts Z) and unlocks all the doors which it controls so that they can be opened by the ordinary handles.

lVhat we claim and desire to secure by Letters Patent of the United States is Means for locking and unlocking the doors of railway carriages comprising locking` bolts, springs for holding the bolts in locked position, a swinging rail, levers connecting the rail to the bolts, said bolts having a slot and pin connection with the levers, a spring for normally holding the swinging rail in a position to unlock the door, a cam adapted to engage with one end ol the rail, and a vane actuated by the air pressure due to the motion of the train for turning the cam into engagement with the rail to lock the door.

ln testimony whereof we have signed our names to this specilication in the presence or' two subscribing witnesses.

DAVID ANDREVS. CHARLES Bltffl'lltlON.

Witnesses S. lV. GiLLn'r'r,

Hnnnn'r RowLAND Annr. 

